Astronomy- Class Notes- Earth, Moon, and Mercury -...

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Astronomy Class NotesEarth, Moon, and MercuryPlanet surfaces are modified by meteor impactsTypical meteorites hit a planet at several Km.Tectonic activityocontinental driftResurfacing Process oDriven by convection, continental platesoSeparate in rift zonesoSlide past each other in fault zonesoCome together in subduction zonesoVolcanoes can create landVolcano EruptionsoMolten rock escaping from the interior of a planet can produce several kinds of featuresoAbout 45 million years ago, the direction of the pacific plate changedColliding PlatesoSubduction- one goes under anotheroCollision- hitting each otherFaults are cracks in the earth’s crustEarthquakes happen when rock on one side of a fault slips with respect to the other side. The location of the break is the focus. Primary waves (P) and secondary waves (s) are emitted in all directions from the focusEarthquakes oTransverse or (S) hear waves and (p) ressure waves oS waves cant travel through a liquid, so only P waves go through the molten outer
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Term
Spring
Professor
Tyson
Tags
Plate Tectonics, Convection, Primary Waves, molten outer core, Astronomy Class Notes, Inner core nickel

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